<template>
  <!-- 购物车 -->
  <view style="padding-bottom: 50px;" v-if="cart.length !==0">
    <!-- 收货地址组件 -->
    <my-address></my-address>
    
    
    
    <!-- 商品列表标题 -->
    <view class="cart-title">
      <uni-icons type="shop" size="18"></uni-icons>
      <text class="cart-title-text">购物车</text>
    </view>
    
    <!-- 商品详细信息 -->
    <uni-swipe-action>
      <block v-for="(goods,i) in cart" :key="i">
        <uni-swipe-action-item :right-options="options " @click="swipeActionClickHandler(goods)">
          <!-- 在 radioChangeHandler 事件处理函数中，通过事件对象 e，得到商品的 goods_id 和 goods_state -->
          <my-goods :goods='goods' :showRadio="true" @radio-change="radioChangeHandler" @num-change="numChangeHandler"></my-goods>
        </uni-swipe-action-item>
      </block>
    </uni-swipe-action>
    <!-- 结算组件 -->
    <my-settle></my-settle>
  </view>
  <!-- 空白购物车区域 -->
  <view class="empty-cart" v-else>
    <image src="/static/cart_empty@2x.png" class="empty-img"></image>
    <text class="tip-text">空空如也~</text>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js' // 导入自己封装的 mixin 模块
  import { mapState,mapMutations } from "vuex"
  export default {
    mixins:[badgeMix],
    computed:{
      ...mapState('m_cart',['cart'])
    },
    data() {
      return {
        options:[{
          text:'删除',// 显示的文本内容
          style:{
            backgroundColor:'#c00000' // 按钮的背景颜色
          }
        }]
      };
    },
    methods:{
      ...mapMutations('m_cart',['updateGoodsState','undateGoodsCount','removeGoodsById']),
      // 商品的勾选状态发生了变化
      radioChangeHandler(e){
        this.updateGoodsState(e)
      },
      numChangeHandler(e){
        this.undateGoodsCount(e)
      },
      swipeActionClickHandler(goods){
        this.removeGoodsById(goods.goods_id)
      }
    }
  }
</script>

<style lang="scss">
.cart-title{
  height: 40px;
  display: flex;
  font-size: 14px;
  align-items: center;
  padding-left: 5px;
  border-bottom: 1px solid #efefef;
  .cart-title-text{
    margin-left: 10px;
  }
}

.empty-cart {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 150px;

  .empty-img {
    width: 90px;
    height: 90px;
  }

  .tip-text {
    font-size: 12px;
    color: gray;
    margin-top: 15px;
  }
}
</style>
